对混凝土柱静态破碎效果的分析

In order to investigate the impact of concrete strength and whether the stirrups are cut off on the static crushing effect of columns, eight concrete columns with different strength grades were drilled at the top of the columns along the column height and injected with static crushing agent slurry, and the stirrups were cut off at the side of the holes for four specimens. The sum of the average width of the cracks was used to indicate the crushing effect of the specimens. Test results show that the crushing effect of the specimens decreased with the increase in concrete strength. For the specimens without cutting off stirrups, the decreasing range of the static crushing effect increased with the increase in concrete strength. For the specimens with the stirrups cut off, the decreasing range of the static crushing effect decreased with the increase in concrete strength. Under the conditions that the column section, reinforcement, pore-forming, and static crushing agent slurry injection were all the same, cutting off stirrups could effectively improve the static crushing effect. However, with the increase in concrete strength, the impact of cutting off stirrups on the improvement of the crushing effect decreased gradually. Specimens without cutting off stirrups had densely distributed cracks, and no blocks fell off during the static crushing process, while after removing the protective layer, the inside of the specimens was crumbly; for the specimens with the stirrups cut off, blocks fell off at the corners of the column during the static crushing process.